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- -

Introduction

-

- IROS is a simple web based overlay which can be integrated into your stream through a browser source. - It allows you to display and arrange text, images and other elements on stream through a web interface. - Anybody with access to the editor link can control the overlay and update it in real time. -

-

- As of now the overlay supports the following elements: -

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  • text
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  • images
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  • emotes (can be searched directly from the editor, provided through 7TV) -
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  • countdowns and timers
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  • audio and video embeds
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  • iframes, i.e. embedding websites
    • -
-

-

- See quickstart to get started with a few simple steps or look below for - a more thorough explanation for setting it up. This tutorial is also available as a video (click on it - to load it): -

- - - -
- Video placeholder -
- -

Getting started

-

- The overlay is split up into two parts, the editor and the overlay itself. To use both of them a new - session has to be created. This will give you two links, one for the editor and one for the overlay. - A new session can be created here: -

-

Create a session

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- - - - - -
- -

- To generate a new session enter the link to you stream and optionally the size of the overlay. The link - to the stream is then used to display it in the background of the editor as a reference when adding and - moving elements. The size is used to make sure that the overlay matches the resolution of your stream. - If no size is provided it will default to 1920x1080. As of right now the editor is optimized for an - aspect ratio of 16:9. -

-

- Once you've entered the stream link click the generate button. Afterwards two links will be displayed. - The first one is the editor link and the second one is the overlay link. The links essentially just - contain a session id which is unique for each overlay.

- Important: The generated links should only be shared - with people - you trust. Anyone that has access to them or the session id they contain can use the editor to change - the overlay. -

- -

Adding the overlay

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- Adding the overlay to your stream is done through a browser source. If you don't know how to add a - browser source to your streaming software here's two links for how to do it in OBS and XSplit: -

- -

- For the following steps OBS studio is used since most people use it. After having added a browser - source you'll be presented with the following dialog: -

- OBS browser source dialog -

- The URL field is where you enter the overlay link. The width and height fields should be set to the - size of your stream so the browser source fills out the entire screen. If you don't know the size of - your stream you can find it in the settings dialog of OBS under the video tab. All other settings - can be left at their default values. After the source has been created it will display the overlay - which by default is empty. -

-

Using the editor

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- The overlay editor is where elements are added, removed and modified. It consists of two windows - and the main canvas area in the center. The canvas area is a representation of the current state - of the overlay. The two tool windows can be moved around by clicking and dragging their title bars - if they are in the way of any overlay elements. If no element is selected the windows will also be - semi-transparent to make it easier to see the canvas area. If you hover over them they will become - opaque. -

-

Keybinds and basic usage

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- After having added an element you probably want make additional changes to it. By default newly added - elements are not visible on stream. Elements that are not visible on stream will be marked by a cyan - dashed border and low opacity. The currently selected element will have a red border. If the element - is scaled down a lot the border might not be visible or hard to see. -

-

- By clicking on any element on the canvas you can change the active selection which will start to display - the settings for the currently selected element in the settings - window. - Once an element is selected there are a few useful keybinds available: -

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  • G enters movement mode, move your mouse to move the object along the x and y axis -
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  • S enters scale mode, move your mouse to scale the object along the x and y axis -
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  • R enters rotation mode, move your mouse to rotate the object around the Z-axis
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  • M mirrors the object horziontally
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  • Shift+M mirrors it vertically
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  • X deletes the element
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  • H toggles the visibility of the element on stream
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  • Ctrl+R resets the scale and rotation
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  • Shift+D duplicates the element
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  • Mouse wheel up/down zoom in/out
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  • Mouse wheel click pans the canvas
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  • Ctrl+Space resets zoom and pan
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- To exit any of the modes press ESC or click anywhere on the canvas. If you have used - Blender before some of the keybinds should be familiar to you. When - moving, - scaling or rotating you can press X, Y or Z to lock - the movement to the x or y axis respectively. -

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- If you have an image link in your clipboard you can paste it into the editor with - Ctrl+V - to create a new image element. The same goes for text which will create a new text element. The editor - also has an internal clipboard which can be used to copy and paste elements. To copy an element press - Shift+C and to paste it press Shift+V. -

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Settings window

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The settings window is split up into three segments:

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  • Adding elements
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  • Canvas settings
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  • Selected element settings
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Adding elements

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- Clicking on any of the buttons at the top of the settings window will add a new element type. -

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Canvas settings

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- Here you can adjust the canvas size which will also be propagated to any overlay loaded in OBS. - You can also change which stream is embed in the background, by entering the URL and the pressing - "embed". -

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Selected element settings

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- Depending on what type of element is selected you'll see different settings. There are some basic - properties that all elements share. The properties are more thoroughly described here. -

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Element list

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- The element list is a window that contains a list of all elements that are currently added to the - overlay. The order of them represents the order in which they are displayed, so if there are two - elements and element A is at the top of the list and element B is below A, A is displayed above B in the - overlay. Clicking on an item in the list will change the currently selected element. -

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Elements

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Basic properties

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- All elements share the following basic properties: -

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  • name
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  • position and size
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  • layer or z-index
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  • opacity
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  • visibility on stream
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  • pivot point
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Name

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Pretty selfexplanatory. The name can be used to make elements easier identifiable, but it does not have - to be unique. IROS generates a separate unique id for each element.

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Position and size

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- Each element has its own size and position. The position and scale are modified by moving or scaling the - element. See Keybinds and basic usage for more info. -

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Layer or z-index

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Determines which elements are drawn at the top. By default all elements use layer 0, so the oder in which - they are drawn is determined by the order in which they are added to the overlay. The last element is - always at the top. If you want an element to be drawn above another one you can achieve this by - either increasing the z-index of the element you want to be above, or by decreasing the z-index of the - element - that should be below. -

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Opacity

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With this slider the opacity or transparency of the element can be modified. If you accidentally set the - opacity to zero you can use the element list to find the element - again.

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Visibility on stream

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By default each newily added element will not be visible on stream to prevent accidentally showing - something - you don't want to show. By checking or unchecking the checkbox next to the eyeball or by pressing - H you can make an element visible or invisible on stream. -

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Pivot point

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- The pivot point determines the origin for scaling and rotating the element. By default it is set to the - center of the object. The setting has three buttons for the horizontal position of the pivot and three - for the vertical position. By clicking on any of the buttons the pivot is modified, which is reflected - for example by how the rotation affects the object. -

- -

Text

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- Can display text using basic markdown formatting, e.g. **bold**, *italic*, - ~~strikethrough~~ or __underline__. -

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The font of the text can be changed by typing the name of the desired font into the font textbox. Keep in - mind that as of right now the desired font has to be installed on the machine that displays the overlay - on stream. -

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Other properties include the color of the text and the background.

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Image

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- The image element can load an Image from any URL and display it in the overlay. If you copy the URL - of an image to your clipboard and paste it in the editor with Ctrl+V a new image - element using the URL from your clipboard will be created. As always the new element will not be visible - on stream by default to prevent accidentally pasted images from showing up. -

- -

Countdown and - timer -

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- This element can either count the time up or down. It is essentially a text element with some logic to - make it keep track of time. You can choose between the two modes "stopwatch" or "timer". If you choose - timer you can enter the time from which it'll count down into the textbox. Lastly there's a start, pause - and reset button to control the time tracking. -

- -

Emotes

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It can sometimes be useful to easily display emotes people use in chat on stream. When clicking this - button a new dialog will open which lets you search for emotes available on 7TV. Type in the name of the emote in the search bar and hit enter or - click "Search". The dialog will show the first 40 emotes that match the query. Click on the emote you - want to add and it'll be added as a new image element to the overlay. -

- -

Audio -

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- The audio element allows embedding of audio files into the overlay. Volume, playback speed, looping - and seeking are all synchronized. Muting however is not to allow the element to be muted in the editor - to - prevent hearing the audio twice. -

- -

Video -

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- The video element allows embedding of video files into the overlay. Volume, playback speed, looping - and seeking are all synchronized. Muting however is not to allow the element to be muted in the editor - to - prevent hearing the audio twice. -

- -

Iframe -

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- The iframe element can embed any website into the overlay. Note that interaction with the website is - not synchronized. So clicking on links, scrolling and other interactions will only affect the iframe - in the current editor but will not be reflected in the overlay. By default interaction with the iframe - is therefore disabled. -

- -

Favorites

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- If there are any elements that you need frequently you can favorite them by selecting them and pressing - F. - When clicking on the favorite button a dialog opens with a list of all favorited elements. Click on any - of them to add them to the overlay. The favorites are saved locally in your browser. If you want to - remove favorites you can click on the "delete mode" button. Afterwards click on any element which marks - it for deletion. If you click an element again it will be unmarked. When you're finished - click "done" and all elements marked for deletion will be removed. -

- -

Frequently asked questions

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Where's the source code? Is this FOSS? Yes, it's available on Github. You can self-host, modify and redistribute this - software under the AGPL 3.0.

-

Can feature X be added? Depends. You can open an issue here to describe - what you're looking for.

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Where can I report bugs? Bugs can be reported on github.

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Why can't I move elements with my mouse? See keybinds and - basic usage.

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Isn't this basically what moonmoon uses? - Yes, it's heavily inspired by that but written from scratch.

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Is the overlay persistent? Overlay state is cached on the server and should be retained - even after a server restart, but there's no guarantee.

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What about latency? The server is located in central Europe so depending on the location - of the streamer and the users of the editor the latency can differ, but it should generally be fast - enough.

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How does this actually work? It's basically just a bunch of plain JS and a small - WebSocket server written in Go. No fancy frameworks.

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